There was but one Yajur veda; but dividing this into four parts, Vyasa instituted the sacrificial rite that is administered by four kinds of priests: in which it was the duty of the Adhwaryu to recite the prayers Yajush() (or direct the ceremony); of the Hotri, to repeat the hymns Richas(); of the Udgatri, to chaunt other hymns Sama(); and of the Brahman, to pronounce the formul called Atharva. Then the Muni, having collected together the hymns called Richas, compiled the Rigveda; with the prayers and directions termed Yajushas he formed the Yajur veda; with those called Sama, Sama veda; and with the Atharvas he composed the rules of all the ceremonies suited to kings, and the function of the Brahman agreeably to practice 5.